Dynamo-electric machine.



No. 850,276. PATENTED APR. 16, 1907.

K. SULZBERGER. 'DYNAMO ELECTRIC MACHINE.

APPLlOATION FILED APR. 3, 1906.

Fig. 2.

Witn eases; inventor:

, Tonal] 'w'horn, it may concern:

Be it known that I, Kilt BL SULZBERGER, a

UNITED STATES PATENT OFFICE;

KARL SULZBERGER, OF BERLIN,GE'RMANY, ASSIGXOR TO GENERAL ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

. DYNAMO-ELECTRIC MACHINE.

citizen of Switzerland, residing at Berlin, Germany, have made certain new and useful Improvements in Dynamo-Electric Machines,

' of which the following is a specification.

. My'invention relates to dynamo-electric ,machines of the commutator type employing a-compensatmg winding for neutralizing the armature reaction and producing a column-- tilting-field; and its object is to provide a novel connection of such a winding by means "Specification of Letters Patent.

Application filed April 3,1906. Serial No. 309,640.

' of whichthe com nsating and commutating fields may be rea ily adjusted independently 1 the winding whichproduces the commutat- 2 5.

of each other.

In machines of this type as 1 arranged heretofore thecompensating and commutating fields have been produced by a single winding, thd'compensating winding simply having afew extra turns at the proper i pointgforproducing the commutating field and all the turns for 'each pole being .con-

nected d mctlyin series with each other. T

By my invention I separate a portion of ingsfieldin whole or in partfrom the rest of the compensating winding for that pole and be adjusted independently of each other. I

' My nvention will best be understood byconnect allcf these. parts in a'group indipendentof the rest 0 the winding, which is connectedin a second grou The two.

groupsmay then be connected in series with each-other, and the portion of the winding which produces .the commutatmg-field may be shunted by an adjustable resistance, and the rest of the winding may .be shunted by another: adjustable resistance, so that the commutating and compensating fields may reference to the accompanying drawings in which. I" F gure 1' shows diagrammaticallya fieldmagnet of a dynamo-electric machine provided with a compensating winding arranged and connected in accordance with my invention, and Fig. 2 shows the field n'iagnet with the winding removed.

In: direct-current machines with a compensating winding for neutralizing the arma ture reaction the field-magnet is preferably arranged, asshown in Patent No. 741,234, a issued to'Deri October 13, 1903, like the stator of an alternatingrcurrent motor, in the form of airing without projecting poles, on the inner periphery of which the windings are Patented April 16, 19071 placed in slots or holesj These slots or holes,

however, are notordinarily, as in an alternating-current machine, uniformly illStIlbuted over the periphery of the field-ring, but

1 on that portion of the ring surrounded by the field-coils. tating poles or lugs which produces arkless commutation. In the slotsc, in 8;(l(1 tl0n to the main'field-coils,'.which are not-shown and each of which extends from a slot con one side of the toothb to the nearest slot 0 on one side of an adjacent tooth b, as shown in Pat'- v 6; it a large slot 0, in which are placed the main v The teeth 1) form the commucut No; 741,234 above mentioned, is placed that portionof the compensating winding 1 which produces the commutatirig-field. The

rest of the compensating winding is distributed throughthe-slots in the portions a of the field-ring which form the main iield-polesoi the machine.

g The arrangement of the compensating winding is shown in Fig. 2. that the main portion of the compensating It will be seen winding produces a flux. distributed over the periphery for neutralizing armature reaction, only a portion-of the fluxrof each coil of the main compensating winding passing through the commutating lugs I), while the entire flux directly surrounding the lug 1) passes through those lugs and is particularly efiective for producing the commutating field.

"of that portion of the; compensating winding The theory of such machines shows that in order to-produ'ce, sparkless commutation not only must the compensating winding have the necessary ampere-turns for neutralizing the armature reaction, but a certain excess of ampere-turns is necessary for-producing the-com'mutating field in the commutating pole,. -In'oider to produce this result, extra turnsv of -the compensating" winding are placed directly around the commutating lug.- winding for each pole are connected directly in series and then in-series with the If all the coils of the compensating" IOS compensatingwinding of the other poles, as

is 'the usual practice, then an adjustment vof the 'commutatingfield will vary the entire which produces the commutating-field..,rela

pendently in a simplemanner. For this pur sistance e to terminal 4. Evidently with over compensated by the adjustment so as to tained by adjusting the number of turns of winding. I can then shunt each group by an compensating effect, and vice versa. For instance, if it is necessary to strengthen the commutating-field in order to produce proper commutation the armature reaction may be produce a crossfield in the opposite direction to that in a machine not compensated. Of course independent adjustment may be ob the portion of the. compensating winding tive to the other portion; but this is exceedingly inconvenient. I

By my invention the compensating and commutating-fields maybe regulated inde-v pose instead of connecting all the compensating turns for each pole directly together in the usual way I connect all those portions of the commutating windings of the several effective in' producing the'commutating field and. then connect the group formed by these portions in series with a second group formed l by the remaining turns of the compensating adjustable resistance, and in this way adjust independently the current stren th through the commutating-field of the'winiling and the other portions, and thereby adjust independently the strength of the compensating and commutating fields. This connection is shown diagrammatically in 1. It the current is supposed to enter at the terminal 1, it will be seen-that it divides, a part passing through the portions of the compensating windings for the several poles which produce the commutating-fields to the terminal 2, while the other part of the current passes through the variable resistance 61 to the ter- Y. minal 2. From there the current passes to terminal 8, at which point it again divides, a part passing through the main portion of the compensating winding to terminal 4 and the other part passing through the variable rethis arrangement by adjusting the resistances d and e, the relative strengths of the compensating and commutating fields may be adjusted. I

I do not desire to limit myself to the'particular construction of field-magnet here shown, since my invention is not limited to any special type of field-magnet, but is applicable to any machine having a winding for compensating for armature reaction and producinga commutating field. I g .What-I claim as new, and desire to secure by Letters Patent of the United States, is-

1.' In a dynamo-electric machine of the commutator type, a field structure provided with a compensating and commutating winding, the commutating portions of the winding for the several poles of themachine' being connected in a groupv and the remaining portions of the winding being connected in another group,

2. In a dynamo-electric machine of the commutator type, a field structure provided with a compensating and co'mmutating' winding, the commutatin portions of the winding for the several po es of the machine being connected in series independently of the rest of the winding, and means for adjusting the relative amounts of current-flow through said commutating portions and, the rest of the winding.

3. In a dynamo-electric machine of the commutator type, a field structure provided with a compensating and commutating winding, the commutatin Winding for the several p0 es of the machine being connected in a group and the remain= ing portions of the winding being connected in another group, and means for varyin the relative amounts of current-flow throug the two groups.

4. In a dynamo-electric machine of the portions of the commutator type, a field structure provided with a compensating and commutating winding, the commutating portions of the winding for the several poles of'the machine being connected in a group and the remain-.

ing portions of the winding being connected in another group, said groups belng connected 1n serles, and a shunting resistance for adjusting the relative amounts of current-flow the several poles being connected in a group and the remaining portions of the Winding being connectedin another group, said groups being connected in series, and independent resistanceshunts for the two groups.

6. In a dynamo-electric machine of"the commutator type, a field structure with a compensating and commutating winding,

the commutating portions of the Winding for the several poles being connected in a group and the remaining portions of the winding being connected in another group, said grou s being connected in series, and two adjustab e resistances shunting said groups respectively. In witness whereof I have hereunto set my hand this 17th day of March, 1906.

KARL SULZBE RGE R- Witnesses:

JULIUS RUMLAND, KARL RIoKEBEN. 

